Sash-operating mechanism



` .f 11 1921'. Oct E. L. ACKERMAN sAsH OPERATING MECHANISM' Filed Apil 19', 192s.

2 Sheets-Sheet 1 mmm...

Patented Oct. 11, 1927.

narran l sfr-Aras PArENT omer.

EDWARD L. ACKERMAE, 1? BETROT, MICHIGAN, ASSIG'NOR T0 ACKERMA'NLBLE'SSER FEZZY CORFORAT'ION, OF DETROIT, M-ICHIGAN, .A COBPORATION OF MICHIGAN;

SASHi-.OPIElRATINGg.r MEGHATIISM.

Application led April 19, 1923. Serial No. 6 33,S5 6.

This invention relates to sash operating mechanism and the object of the invention is to provide 'a sash operating mechanism which will not get out of order and which provides a means for raising or lowering a y sash in which the sash is automatically held in position by the operating mechanism at any point in its path of travel. Another' object of the invention isy to provide a sash operating mechanism. by which the window may be dra-wn to the bottom of the recess provided therefor thus resulting in a saving of space which is very important in present day closed vehicle body construction. yA further object of the invention is to provide a sash operating mechanism in which the weight of the sash is counter-balanced to allow a thread of greater pitch to be used in the operating mechanism, thereby providing a sash which may be moved through its path of travel with fewer turns of the Yoperating crank. Another object of the invention is to provide a sash operating mechanism in which the sash is prevented from vibrating within the frame at any adjustment thus eliminating objectionable noises usually caused when the automobile is passing over a rough road. A further object of the invention is to provide a sash operating mechanism in which the sash is supported at two points throughout its path of movement the said points moving upward or downward in a horizontal planethus preventing the sash from binding in the guideways or frame therefor. These objects and the several novel features of the invention are` hereinafter more fully described and claimed and CAD the preferred form of construction by which these objects are attained is shown in vthe accompanying drawings `in which- Fig. 1 is a view of a portion of a closed vehicle body with the upholstery removed to show the sash operating mechanism.

Fig. 2 is a view ofthe sash operating mechanism when the sash is at its lowermost position.

Fig. 3 is a section taken on line 3-3- of Fig. 1 showing the operating mechanism in the lowermost position.

Fig. 4 is an enlarged detail of the counterbalance spring.

Fig. 5 is an enlarged section taken on line 5-.5 of Fig. i.

As shown in Fig. 1 a framework 1 is provided having guides 2 therein in which a window 3 is slidably mounted. As showny in Figs. 1, 2 and 3 thewind'ow 3 is provided-l with a sash 4 and secured to the lower edge of the sash 4. as shown more particularly in Fig. 1 is a way which is spaced therefrom. rlhe frame member lis provided with a cross support 6which is secured to the framememr ber at opposite ends and secured to. this support 6 by screw 7 is a; plate 8. As shown nFig. 3 themember 6 is provdedwitha rec e,ss9 through which a portion of the; mecha-VV nism extends and the plate 8 at the lower; endv is provided witha bearing 10 for a screw. shaft 11. A collar 12,v shown more par-tic-V ularly .at the upper end of Fig. .3, isfsecnred to the. plate 8 by screws 13 shown morel particularly in Fig. 1.r A screw 14 is provided inthe flange in the kcollar 12 and extends into an annular groove 15 in the hub ofthe` crank 16 which allows rotation of the crankl and prevents removal thereof from themember 12. The crank 16 is,y provided with a.

Vsquare recess 17 in the.v hub thereofv fittin over a square end 18 of the shaft 19. Secure to the end of the shaft 19 is a bevel gear 22 -1 meshing with a bevel gear 23 secured to tlie. upperv end of a screw shaft 11 'the arrange,-

ment being such that rotation of the crank 16 rotates the screwr shaft 11. A pairof lazy tongs are provided for raising orlowering the window and consists Ofa pair ofarnisf2f1;` and. 24a pivotedat a common center on the bearing 25. Pivoted at the` outer ends of: the arms 24 and 24a on the members. 26 and 26a shown in Fig. 4, is a pair of crossed arms 27 and 27a which are pivoted at the point of intersection Athereof on a nut 28 which is threaded on the screw shaft 11. The arms 27 and 27'A are rprovided with outwardly bent ends 29,7 eachend carrying a pin on which a roller 3() is rotatably mountedand extends between thesash 4v and the way 5 as shown in Figs. 1, 2l and 3. These ends 29 are bent so that when the nut 28 kis moved to thel lowermost position shown in Fig.' 2 the pins 30 will move the window and sash to. position on the lower cross frame member 1y of the vehicle body. The bearing 25 as; shown in Fig. 3 is provided with a recess therein containing a ball 35 on which the lower end of the shaft 11 is rotatably supported. To counter-balance the weight of the sash the pivot pin 26 is secured tothe armk 27 and is provided with a slot lin the end thereof shown more. particularly in Figs. 4 and 5,. 11.0

One end of a flat coiled spring 33 is inserted in the slot in the member 26 and the opposite end thereof engages about a pin 311 -provided on the arm 24. The spring 33 is a tempered spring of considerable stiffness and tends to move the joint between the arm 24 and 27 inwardly toward the shaft l1 thus extending the lazy tongs. The pivot pin 26a on the opposite side of the lazy tongs is secured to the arm 24a and the arm 27a is pivoted on this pin. The coiled spring 33a is secured in the slot provided in the pivot pin 26a andthe opposite end thereof engages about a pin 34a secured to the arm 27a. 33L tends to move the joint between the arms 24Ca and 27a inwardly toward the shaft 11 similar tothe action of the spring 33, and both springs operate in conjunction andftend to lift the sash by extending the lazy tongs, the said lifting action being prevented by the position of the nut 28 on the shaft 11 so that the action of the spring tends to counterbalance the weight of the sash and relieves the nut 28 of all strain.

The window is shown in the uppermost closed position in Fig. 1 and to lower the window the crank 16 is rotated in a counterclockwise direction which rotates the shaft 1'1 Aand moves the nut 28 downward thereon.

` This movement of the nut 28 moves the lazy the way the window and sash is lowered into the lower portion of the vehicle body,

the windowv being in the lowermost position when the nut 28 has traveled to the lower end of the shaft 1 1 as shown in Fig. 2. Asthe mechanism moves from the position shown in Fig. 1 to that shown in Fig. 2 the spring-s 33 and 3@x are compressed and counter-balance the weight of the sash during its downward movement. To raise the win` dow the crank 16 is rotated in a clock-wise direction causing the nut 28 to travel up the shaft l1 and the springs 33 tend to expand andv assist in the upward movement of the nut 28 and of the window in the .sa-sh byV counter-balancing the weight of the sash. If they said springs were not used the rotation of the crank to raise the window would be more difficult than lowering the sash as the Weight of the sash would retard upward movement of the nut 28 on the shaft 11. By using the springs v33 and 33a the weight of the sash is counterbalanced and a thread of greater pitch may be used on the shaft l1 as the strain is taken off the shaft thus allowing the window to be raised or lowered with fewer rotations of the crank 16and shaft 11. As'the crank 16 is rotated in a clock-wise direction the lazy tongs are moved from the position shown in Fig. 2 to that shown in Fig. 1 and by means of the rollers move the window. up to the closed position as will be readily understood from the rIhe coiled spring drawing. It is to be noted that with this device the window is solidly supported in position at any point upon cessation of rotation of the crank 16. It is also to be noted that the window is supported throughout its movement at two points one adjacent each vertical edge. thereof so that the window is raised or lowered without binding in the frame therefor. Vhen the device has been secured in place, the frame 1 is covered with upholstery cloth up to and over the member 6 so that all the mechanism except the crank 16 and collar 12 is hidden from view.

I have shown and described what I have termed a flat spiral spring, the drawing showingit being formed of va fiat strip of metal. lIt is to be understood, however, that any shape ofy metal may be used forthis spring and, while'preferably the spiral is flat in formthat is, all the turns thereof occupying the same general plane, the suc# cessive convolutions may be arranged in the form of a cone or other well known type of spiral spring. f

From the foregoing description it becomes evident that the device is very simple and efficient in operation, will not easily get out of order, is composed of few partsv and is of consequent low manufacturing cost `in comparison with other devices of like nature, and provides a device which accomplishes the objects described.

Having thus fully described kmy invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States i's- Y In sash operating mechanism, the combination with a window casing, havingV side grooves and a sash-slidable in the grooves, the lower portion of theV window casing being formed to provide a pocket into which the sash may be moved and thepocket being of a depth approximately equal to the length of the sash whereby when the sash when moved into the pocket vengages the bottom ofthe pocket andis practically flush with the opposite end thereof, of operating mechanism for the sash positioned within thepocket comprising a screw shaft extending lengthwise of the pocket, a bearing lfor the shaft end at the bottom of the pocket, means near the top of the pocket for supporting ieu the opposite end of the shaft, means for rof tating the screw shaft, said screw shaft being positioned at one side of the planeiof opposite ends being in pivoted relation respectively with the pivoted arms, a.y roller mounted at the end of each curved arm, a

Way in the bottom of the sash into whichv the rollers project, and oounterbalanoing springs at the point of connection of the crossed arms with the said pivoted arms, the lazy tongs structure lying between the screen shaft and the plane of movement of the sash,

EDWARD L. ACKERMAN. 

